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https://issues.apache.org/jira/browse/HBASE-27186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Beaudreault reassigned HBASE-27186:
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Assignee: Bryan Beaudreault
> Report block cache size metrics separately for L1 and L2
> --------------------------------------------------------
>
> Key: HBASE-27186
> URL: https://issues.apache.org/jira/browse/HBASE-27186
> Project: HBase
> Issue Type: Improvement
> Reporter: Bryan Beaudreault
> Assignee: Bryan Beaudreault
> Priority: Minor
>
> Currently, in terms of block cache size metrics, we report the following:
> blockCacheFreeSize, blockCacheCount, blockCacheSize, blockCacheEvictionCount.
> This isn't super useful when running with BucketCache, because in that case
> L1 (holding index/meta blocks) and L2 (holding data blocks) operate largely
> independently. Additionally, you might typically report on block cache sizes
> in terms of monitoring heap usage. But with BucketCache, the cache is
> off-heap, so it becomes a misleading metric in that case.
> We have metrics l1CacheHitCount/MissCount/HitRatio/MissRatio, and the same
> for l2. We should add l1CacheFreeSize, l1CacheSize, l1CacheCount,
> l1CacheEvictionCount, and the same for l2.
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